--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/cpp/line5.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,15 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+/* { dg-options "-fpreprocessed" } */
+
+/* Source: Neil Booth, 16 Sep 2001.
+
+   This file, with an indented line marker, is not possible without
+   user editing of preprocessed output, or the user using
+   -fpreprocessed on raw source.  Nevertheless, we should not
+   segfault.  This is a test that we don't back up two tokens in
+   cpplib.c - one to back up over the number, and one when we
+   recognize that it's not a valid directive in preprocessed input.  */
+
+ # 1 "foo.c"